One of the best looking games ever that should totally be a Nintendo exclusive. (Yeah, I'm jealous, what of it?!)
Anywho... It's made by the people who did Totoro, Spirited Away, etc. Aka, Studio Ghibli. It's a cell-shaded looking game that's based off of the original title on the DS.
Edit: Forgot Level 5. It's made by them too.